:-'Generic Commit'

dropshell-tool/openssl-1.1.1w/test/testutil/random.c

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include "../testutil.h"
+
+/*
+ * This is an implementation of the algorithm used by the GNU C library's
+ * random(3) pseudorandom number generator as described:
+ *      https://www.mscs.dal.ca/~selinger/random/
+ */
+static uint32_t test_random_state[31];
+
+uint32_t test_random(void) {
+    static unsigned int pos = 3;
+
+    if (pos == 31)
+        pos = 0;
+    test_random_state[pos] += test_random_state[(pos + 28) % 31];
+    return test_random_state[pos++] / 2;
+}
+
+void test_random_seed(uint32_t sd) {
+    int i;
+    int32_t s;
+    const unsigned int mod = (1u << 31) - 1;
+
+    test_random_state[0] = sd;
+    for (i = 1; i < 31; i++) {
+        s = (int32_t)test_random_state[i - 1];
+        test_random_state[i] = (uint32_t)((16807 * (int64_t)s) % mod);
+    }
+    for (i = 34; i < 344; i++)
+        test_random();
+}